Water-cooled guide disk



March 17, 1936. s, EfmEscHR 2,034,284

WATER COOLED' GUIDE DISK Filed Oct. 19, 1955 2 Sheets-$he 1 H II I I IIII INVEN1 '0R. &maa/Z BY W/T/YESS M, mw w ,5 ATTORNEYS.

k 1936- s. E. DIESCHER 2,034,284

' WATER CQOLED GUIDE DISK.

v Filed 001;. 19, .1953 2 Sheets-Sheet 2 A HORNE Y5.

Paton ted Mar. 17, me I 2,034,284

(UNITED STATES PATENT OFFICE WATER-COOLED GUIDE DISK Samuel E.Diesclier, Pittsburgh, Pa., assignor to Dleschei- Tube Mills, Inc.,Pittsburgh, Pa., a corporation of Delaware Application October 19, 1933,Serial No. 694,255

My invention relates to water-cooled guide water-cooled systems wherebythetemperature disks, and particularly to such guide disks as arevariation and the corresponding expansion and employed in connectionwith cross-roll mills. o ac ion of the guide d sks may be limited In theconstruction and operation of cross-roll within such ranges as not todetrimentally aflect mills, such for example as those shown and dethesizes of the tubes that are rolled thereby. 5 scribed in my Patent No.1,870,209, granted Au- I provide an emcient arrangement for 8111 gust 2,1932, tubular blanks on mandrels are plying cooling water to theinteriors of the rapidly passed between two cross rolls the axes ofwhich rotating guide disks while in operation, and also are inclined toeach other and to the pass line of for the escape either of steam or ofhighly heated the tubular blanks. The tubular blanks are water in orderto dis of such heat as may be 10 caused to move through a helical pathby the necessary to retain the guide disks within a preaction of thecross rolls. determined maximum temperature.

Guide disks that are mounted on axes at right The details of myinvention will be described angles to the pass line between the crossrolls in connection with the accompanying drawings,

limit the outward bulging of the metal caused by in which Fig. 1 is aface view of a cross-roll mill 15 the action of the cross rolls andthereby control embodying guide disks constructed in accordthe outerdiameter of the resulting tube. The once with my invention and lookingin the direcguide disks are preferably driven at a higher tion of feedof a blank through it, a mandrel and peripheral speed than thelongitudinal travel of a blank being shown in transverse section at thethe tubular blanks, whereby the transverse fricthroat of the pass; Fig.2 is an enlarged trans- 20 tion between the tubular blanks and the guideverse cross-sectional view of one of the guide disks is materiallyreduced and the flow of the disks taken on line H-II of Figand 3 ismetal due to compression between the cross rolls a face viewsof theguide disk of Fig. 2.

p and the mandrel is directed longitudinally and Them l illustrated ins- 1 comprises a pa the blank is pulled forward in the pass. ofoppositely disposed cross rolls l and 2 having 25 The almost continuousoperation of the guide their axes inclined to each other and to the linedisks in contact with highly heated metal when of feed of a blankbetween them. Disposed bethe mill is operating at a high rate ofproduction tween the cross rolls and on opposite sides of the andparticularly at peripheral speeds much pass between them is a pair ofadjustably mounthigher than the longitudinal travel of the metal edgrooved guid r 11 disks 3 and a r n 30 causes the guide disks t becomehighly h ated, on horizontal axes and adapted to be driven in with theresult that the diameters of the disks any suitable or usual manner, asby wobblers, not may vary somewhat in accordance with the varishown. Inthe pass formed between these two ations in their temperature and thediameters of pairs of rolls is shown a cylindrical mandrel 5 the tubesmay have corresponding variations in within a tubular blank 6 undergoingreduction in 35 the opposite direction. wall thickness and elongation bythe combined It will be appreciated that, as the temperatures actions ofthe rolls. of the guide disks increase, their diameters may While thestructure of the disks 3 and 4 and also increase with the result thatthe space hethe manner of mounting and the details of asso- 40 tween thedisks is shortened and the diameter of ciated parts are substantiallyidentical, the de- 40 the resultant tubes, which is controlled by thetails of the lower guide disk 4 only are shown by spacing of the guidedisks, may be diminished. way of example. The disk 4 is provided with aSimilarly, if the guide disks have been adjusted shaft i that issuitablysplined as at 8 for attachat their higher temperatures forproducing tubes ing driving connections thereto. At the opposite of theproper diameter and the disks are cooled, end of the shaft 1 is a thrustbearing 9 at the 45 as might occur during a breakdown or stop for outerend of which is a hood l0 engaged by a repairs or for other reasons, theshrinkage of the bar ii. The lower portion of the hood is provided guidedisks by cooling will cause the tubes subsewith an opening or slot I2through which extends quently produced to be larger in diameter than afeed pipe 3 for supplying cooling water to the those rolled by the guidedisks while the latter are guide disk 4 in a manner to be presentlydescribed. 50

' at their higher temperatures. This condition Reference may now be hadto Figs. 2 and 3 will obtain until the disks are again at their whichillustrate in enlarged detail the construchigher temperatures. tion ofthe guide disk 4. The shaft 1, only a In accordance with the presentinvention I portion of which is shown, is provided with an P v de guidedisks for cross-roll m ls that have enlarged cylindrical portion iii toconstitute a s5 is a feed pipe l3 preferably of steel for supplyingwater to the interior of the disk. The feed pipe I3 is connected to theouter end of the pipe i3. The pipe [3 is closed at its inner end.The'pipes i1 and I8 which rotate relatively to each other -may have arelatively close flt in order to minimize seepage in case no stuflingbox is provided at the outer end of the shaft 1. Such seepage will besubstantially eliminated if a stuffing box i3 illustrated in Fig. 2 isemployed.

The pipe I! preferably does got extend to the inner end of the borel6-and thereby provides an annular space 2| surrounding the end of thepipe l8 and which extends to the inner end of the bore l6. The 'pipe I3is provided adjacent its inner end with a plurality of radial openingsor discharge ports 22 that communicate with the annular space 2|.

The shaft 1 is provided with eight radial holes or passages 23 that arein substantially the same plane as the openings 22 and communicate withthe annular space 2|. Surrounding the enlarged portion, or seat, i5 isthe hub portion 24 of the guide disk and which has extending radiallytherethrdugh passages 25 that are in alignment with the passages 23 inthe shaft 1.

Extending around the outer periphery of the hub 24 is an annular memberthe inner part of which is a ring 26 having an inwardly extending flange21 that is bolted to the hub 24 by means of a series of bolts 23that'are eight in number although any suitable number may be employed.The ring 26 is. similarly provided with eight radially extendingpassages 23 that register with the passages 25 of the hub.

Surrounding the ring 26 are two annular wall members 3| and 32 that areinclined toward each other in the direction toward their outer edgesupon which they support a relatively narrow and radially thin rim 33.Preferably the annular members 3| and 32 are welded to the ring 26 andto the rim 33. The latter is most desirably of forged steel of thelowest possible coeiflcient of expansion that can be welded in order tominimize changes in dimension with variations in temperature. The rim 33is most desirably provided with an outer coating.34 of an alloy that ishighly resistant to abrasion and wear.

The aligned passages 23, 25, and 29 constitute inlet passages forcooling water into the annular chamber 35 formed by the members 3| and32 and the ring 26 and the rim 33. Outlets from the chamber 35 areprovided as shown in the lower portion of Fig. 2 and indicated in dottedlines in Fig. 3. Each outlet comprises a short radial hole 36 extendingfrom the chamber 35 radially inward to connect with a transverse passage31 through the ring 26 the ends of which passage are open to theatmosphere.

Asbest shown in Fig. 2 each outlet opening 36 is partially covered by abaflle 38 of substantially v-shape the outer portions of which areslightly spaced from the inner surfaces-of the wall members 3| and 32.The baflles 38 serve the purpose of preventing water from flowingdirectly from the chamber 35 into the openings 36 when the guide disk isin motion, and they also serve to reduce the amount of entrained waterthat such steam as may escape from the outlet port can carry entrainedinto the openings 36.

It may be assumed that the cross-roll mill of Fig. 1 is being driven atits normal operating speed and rolling tubular blanks on mandrels toreduce the wall thickness of the blanks and elongate them, by passingthem between the cross rolls and 2 and the guide disk 3 and 4. The

guide disk 3 and 4 will be supplied withcooling water through feed pipessuch as pipe l3 of Fig. 1 into the interior of their supporting shaftfor distribution into the annular chamber 2| of each guide disk.

Water flows substantially equally in all directions through the alignedinlet passages 23, 25,

and 29 into the chamber 35 and is'thrown outwardly against the rim 33 bythe centrifugal force of the rapidly rotating disk and by the inclinedsides of the members 33 which deflect the water to the outer portion ofthe chamber .35 and against the rim 33. Water entering the chamber 35 isthus prevented from flowing along the inner wall of the chamber and-outthrough the outlet openings 36 unless the chamber is filled with water.

When the rim 33 is in contact heated tubular blanks during the rollingoperation, heat is conducted to the rims from the tubular blanks and tosome extent from the rim to the wall members 3| and 32, and heat is alsogenerated in the rims by reason of the frictional engagement of theblanks and the rapidly rotating guide disks. Heat from the rim and wallmembers passes to the water, in thechamber. In case steam is generatedit will collect on the inner surface of the chamber 35 becausethe wateris thrown outwardly by centrifugal force. The steam will flow outwardlythrough the outlets 36 and 31 and escape into the atmosphere to carryaway the excess heat that has been imparted to the rim 33. If the supplyof water through the feed pipe l3 has been sufliciently rapid, hot watermay escape through the outlet ports before steam is formed.

The flow of cooling water may be regulated as desired in order to insurethat the temperature with the highlyof the guide disk and especially ofthe rim does When the mill is brought to rest and the sup-- ply ofcooling water for the guide disks is cut off, the major portion of thecooling water in the chamber 35 will escape through the outlet openingsin the lower portions of the guide disks in their stationary position.It is advisable therefore to rotate the guide disks and to supply themwith cooling water prior to the rolling of tubular blanks thereby.

The advantage of water-cooled guide disks for cross-roll mills inaccordance with my invention is that the temperature of the guide disksmay be suitably controlled within such limits as to prevent unduevariations in the diameter of the guide disks. Uniformity in thediameter of the guide disks permits a corresponding uniformity in thediameter of the tubes produced by the osages cross-roll mill of whichthe guide disks are an important part.

The reduction in temperature of the disk surfaces in contact with thetubes eliminates the rapid wear of the grooves that would occur at thehigher temperatures.

The foregoing and other advantages will be apparent to those skilled inthe art of constructing and operating apparatus of the same generalcharacter as the-guide disks of my invention.

I claim:

- l. A guide disk for cross-roll mills, comprising a hub portion; and acircumferential rim portion adapted to be heated by frictionalengagement with hot surfaces, and having a continuous annular chamber ofuniform cross-section extending around said disk adjacent said rimportion, passages for supplying cooling fluid through said hub portionto said chamber, and outlets for the cooling fluid opening from innerportions of said chamber. a

2. A guide disk for cross-roll mills, comprising a hub portion, acircumferential rim portion, a liner formed of a different metal thanthe rim portion secured to the periphery of the latter and adapted to beheatedbyfrictional engagementwlth hot surfaces, an annular chamber theouter wall of which is constituted by said rim portion and which is soshaped as to take advantage of the forces developed by rotation of saiddisk to concentratedly apply a cooling fluid to the periphcry of saidiim portion, inlet passages for cooling fluid extending through said hubportion and communicating with said chamber, and outlet passages fromsaid chamber.

3. A guide disk for cross-roll mills, comprising a shaft, a hub on saidshaft, an annular member surrounding said hub and supported thereby,said annular member having two laterally spaced wall portions and a rimsupported on the outer peripheries of said spaced wall portions toconstitute an outer wall' for a chamber between said spaced portions, apassage extending axially of said shaft, passages extending radiallybetween the axial conduit and said chamber, and outlet passages fromsaid chamber.

4. A guide disk for cross-roll mills, comprising a shaft, a hub on saidshaft, an annular member surrounding said hub and supported thereby,said annular member having two laterally spaced wall portions and a rimsupported on the outer peripheries of said spaced wall portions toconstitute an outer wall for a chamber between said spaced portions, apassage extending axially of said shaft, passages extending radiallythrough said hub and said member to connect the l conduit to saidchamber, and outlet passages extending inwardly from said chamber.

5. A guide disk for cross-roll mills, comprising a shaft, a hub on saidshaft, an annular member surrounding said hub and supported thereby,said annular member having two laterally spaced wall portions and a rimsupported on the outer peripheries of said spaced wall portions toconstitute an outer wall for a chamber between said spaced portions, apassage extending axially of said shaft, passages extending radiallythrough said hub and said member to connect the axial conduit to saidchamber, and outlet passages each comprising a portion extendinginwardly from said chamber and a portion extending laterally of saidannular member and opening to the atmosphere.

6. A guide disk for cross-roll mills, comprising a rim portion adaptedto be heated, an annular cooling chamber of uniform cross-sectionadjacent thereto, inlet passages adapted to supply cooling fluid to theperiphery of said chamber while the disk is rotating, outlet passagesfrom said chamber, and means for causing cooling fluid to travel atortuous path in said chamber to enter said outlet passages.

'l. A guide disk for cross-roll mills, comprising a peripheral portionadapted to be heated, an annular cooling chamber of uniformcross-section formed in the disk proper adjacent said peripheralportion, inlet passages adapted to supply cooling fluid to said chamberwhile the disk is rotating, outlet passages from said chamber, and meansfor causing cooling fluid to travel a tortuous path in said chamber toenter said outlet passages, said means comprising a shield ad-Jacent-the openings of said outlet passages for deflecting liquidtherefrom.

8. A guide disk for cross-roll mills, comprising a portion adapted to beheated, a cooling chamber adjacent thereto, inlet passages adapted tosupply cooling fluid to said chamber while the disk is rotating, outletpassages from said chamher, and means for causing cooling fluid totravel a tortuous path in said chamber to enter said outlet passages,said means comprising a member having -a non-radial surface fordeflectin liquid toward said portion of the disk adapted to be heated;

9. A guide disk for cross-roll mills, comprising a portion adapted to beheated, a cooling chamber adjacent thereto, inlet passages adapted tosupply cooling fluid to said chamber while the disk is rotating, outletpassages from said chamber, and means for causing cooling fluid totravel a tortuous path in said chamber to enter said outlet passages,said means comprising a member of approximately v-shape spanning eachopening into said outlet passages.

10. A guide disk for cross-roll mills, comprising an annular rim formedof a different metal than the rest of the disk and adapted to be heatedby contact with hot surfaces, two spaced annular wall members connectedto said rim and extending inwardly therefrom, a ring connecting theinner edges of said spaced annular members to form a chamber for coolingfluid adjacent said rim, a hub for supporting said ring, inlet passagesextending through said hub and said ring for.

supplying cooling fluid to said chamber, and outlet passages from innerportions of said chamber.

11. A guide disk for cross-roll mills, comprising an inner portion andan outer peripheral portion adapted to be heated by frictionalengagement .with hot surfaces, and having a continuous annular chamberof uniform cross-section extending around said disk adjacent said outerperiph- 'eral portion, a passage for supplying cooling fluid through theinner portion to said chamber, and an outlet for the cooling fluidopening from an inner portion of said chamber.

12. A guide disk for cross-roll mills, comprising a disk shaped rollmounted for rotation on an axially disposed supporting shaft, 9. wearingsurface formed of an alloy highly resistive to abrasion secured to theperiphery of said disk, an annular cooling chamber of uniformcross-section provided-in said roll adjacent its periphery, means forsupplying a cooling fluid to said cool-. ing chamber to minimize thedistortion strains due to temperature changes between said wear surfaceand the rolls, and means for discharging said cooling fluid from thecooling chamber.

13. A guide disk for cross-roll mills, comprising a hub, the sides ofwhich are-extended beyond the body proper thereof in spaced relationwith each other to provide at its periphery a rim-cooling chamber, awork-engaging rim made of a different material than the hub secured tothe peripheries of said spaced side walls and forming therewith anannular cooling chamber of uniform cross section, and means forsupplying a cooling medium to and exhausting it from said coolingchamber.

14. A guide disk for cross-roll mills, comprising a hub, the sides ofwhich are extended beyond the body proper thereof in spaced relationwith each other to provide at itsperiphery a rim-cooling chamber, awork-engaging rim having a different coeflicient of expansion than thehub secured to the periphery of said extended side walls and formingtherewith an annular cooling chamber of uniform cross section, and meansfor supplying a cooling medium to and exhausting it form cross section,means for supplying a cooling medium to and exhausting it from saidcool'- ing chamber, and means for directing the flow oi the coolingmedium through said chamber in such a way as to provide substantiallyuniform transfer of heat from said rim.

SAMUEL E. DIESCHER-.

